The Wayne County-owned building at 511 Woodward Ave. next to the Guardian Building is up for sale again.

It is being marketed by Southfield-based Farbman Group. There is no asking price for the squat, 30,000-square-foot building, although offers are due by May 25.

The listing says it "could be expanded in its existing configuration to create larger usable floor plates or a major redevelopment could be considered at the site with new construction."

It sits in the heart of downtown but has complications because the HVAC system for the county's Guardian Building headquarters sits atop it.

Before Wayne County Executive Warren Evans took office to succeed Robert Ficano, Detroit-based developer The Roxbury Group had considered the four-story building for redevelopment. Wayne County's economic troubles and an incoming administration scuttled the plan.

"The market only got better over time," said Khalil Rahal, the county's economic development director and assistant county executive.

The building was part of a real estate deal with Detroit-based Sterling Group that included the Guardian Building and a parking deck during the Ficano administration.